123400500 has 48 divisors (see below), whose sum is σ = 359346624. Its totient is φ = 32906400.

The previous prime is 123400463. The next prime is 123400517. The reversal of 123400500 is 5004321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 123400500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39634 + ... + 42633.

It is an arithmetic number, because the mean of its divisors is an integer number (7486388).

Almost surely, 2^123400500 is an apocalyptic number.

123400500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123400500 is an abundant number, since it is smaller than the sum of its proper divisors (235946124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123400500 is a wasteful number, since it uses less digits than its factorization.

123400500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82289 (or 82277 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 123400500 is about 11108.5777667530. The cubic root of 123400500 is about 497.8581715760.

Adding to 123400500 its reverse (5004321), we get a palindrome (128404821).

The spelling of 123400500 in words is "one hundred twenty-three million, four hundred thousand, five hundred".